diff --git a/README.md b/README.md
index 5e306db..5d5acbb 100644
--- a/README.md
+++ b/README.md
@@ -2,15 +2,15 @@
 
 ## Environment Variables
 
-UID: UID of host/guest user.
+**UID:** UID of host/guest user.
 
-GID: GID of host/guest user.
+**GID:** GID of host/guest user.
 
-MODEL: Path to model (required).
+**MODEL:** Path to model (required).
 
 ## Instructions
 1. Create an ExoPlaSim model
 2. Save it as model.py
-3. Set the MODEL environment variable to the directory containing your model.py
+3. Set the `$MODEL` environment variable to the directory containing your model.py
 4. Run the docker container with `docker compose run -it --rm exoplasim`